Theoretical Prediction of Selectivity in Kinetic Resolution of Secondary Alcohols Catalyzed by Chiral DMAP Derivatives
作者:Evgeny Larionov、Mohan Mahesh、Alan C. Spivey、Yin Wei、Hendrik Zipse
DOI:10.1021/ja302420g
日期:2012.6.6
The mechanism of esterification of the secondary alcohol 1-(1-naphthyl)ethanol 9 by isobutyric anhydride catalyzed by 4-pyrrolidinopyridine (PPY, 11) and a series of single enantiomer atropisomeric 4-dialkylaminopyridines 8a-g has been studied computationally at the B3LYP/6-311+G(d,p)//B3LYP/6-31G(d) level. Comparison of the levels of enantioselectivity predicted computationally with the results obtained
在 B3LYP 计算研究了由 4-吡咯烷吡啶 (PPY, 11) 和一系列单一对映异构体阻转异构体 4-二烷基氨基吡啶 8a-g 催化的异丁酸酐酯化仲醇 1-(1-萘基)乙醇 9 的机理/6-311+G(d,p)//B3LYP/6-31G(d) 级别。将计算预测的对映选择性水平与实验获得的结果进行比较,使该方法得到验证。该方法的价值由成功预测证明,即催化剂内芳基从苯基到 3,5-二甲基苯基的结构改性将导致此类动力学拆分 (KR) 反应的选择性水平提高,正如随后对该催化剂的合成和评价进行了验证(8d)。实验上,